Morphology-dependent electrocatalytic performance of Fe2(MoO4)3 for electro-oxidation of methanol in alkaline medium

Daoming Zhang; Liheng Zhang; Wei Zhang; Mengfei Huo; Jiajia Yin; Guoju Dang; Zhen Ren; Quansheng Zhang; Jingying Xie; Samuel S. Mao

doi:10.1016/j.jmat.2017.03.002

Journal of Materiomics (Jun 2017)

Morphology-dependent electrocatalytic performance of Fe2(MoO4)3 for electro-oxidation of methanol in alkaline medium

Daoming Zhang,
Liheng Zhang,
Wei Zhang,
Mengfei Huo,
Jiajia Yin,
Guoju Dang,
Zhen Ren,
Quansheng Zhang,
Jingying Xie,
Samuel S. Mao

Affiliations

Daoming Zhang: School of Chemical and Environmental Engineering, Shanghai Institute of Technology, Shanghai 201418, China
Liheng Zhang: School of Chemical and Environmental Engineering, Shanghai Institute of Technology, Shanghai 201418, China
Wei Zhang: School of Chemical and Environmental Engineering, Shanghai Institute of Technology, Shanghai 201418, China
Mengfei Huo: School of Chemical and Environmental Engineering, Shanghai Institute of Technology, Shanghai 201418, China
Jiajia Yin: School of Chemical and Environmental Engineering, Shanghai Institute of Technology, Shanghai 201418, China
Guoju Dang: School of Chemical and Environmental Engineering, Shanghai Institute of Technology, Shanghai 201418, China
Zhen Ren: School of Chemical and Environmental Engineering, Shanghai Institute of Technology, Shanghai 201418, China
Quansheng Zhang: School of Chemical and Environmental Engineering, Shanghai Institute of Technology, Shanghai 201418, China
Jingying Xie: Shanghai Institute of Space Power Sources, Shanghai 200245, China
Samuel S. Mao: Department of Mechanical Engineering, University of California at Berkeley, Berkeley CA94720, USA

DOI: https://doi.org/10.1016/j.jmat.2017.03.002
Journal volume & issue: Vol. 3, no. 2
pp. 135 – 143

Abstract

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Electrochemically synthesized nanosphere, nanorod and nanotube Fe2(MoO4)3 at optimized temperature and current density are characterized with XRD, SEM, TEM, XPS. Crystal lattices of the three types Fe2(MoO4)3 detected by HRTEM are well matched with the simulation analysis results from Materials Studio 6.0 based on the inorganic crystal structure database (ICSD) data and the modified XRD lattice parameters. The ratios of Fe/Mo on the surface resulted from XPS analysis are 1.47, 1.63 and 2.22 respectively for nanosphere, nanorod and nanotube. The mixture of Fe2(MoO4)3 with polytetrafluoroethylene dispersion are coated on glass carbon substrate as electrode for electrocatalytic performance test by cyclic voltammetries in 0.1 mol/L KOH and 1 mol/L methanol electrolyte. Methanol oxidation peak current density of the Nanotube- Fe2(MoO4)3/GCEs electrode is 3.27 mA/cm2 higher than 2.8 mA/cm2 of platinum foil electrode, which shows enhanced catalytic activity of Nanotube-Fe2(MoO4)3/GCEs. The cyclic stability in terms of peak current retention are 91%, 92% and 88% respectively for Nanosphere-Fe2(MoO4)3/GCE, Nanorod-Fe2(MoO4)3/GCE and Nanotube-Fe2(MoO4)3/GCE electrode after 220 cycles. It is concluded that nanosized Fe2(MoO4)3 could be promising alternative non-noble electro-catalysts for electro-oxidation of methanol in alkaline medium.

Published in Journal of Materiomics

ISSN: 2352-8478 (Print); 2352-8486 (Online)
Publisher: Elsevier
Country of publisher: Netherlands
LCC subjects: Technology: Electrical engineering. Electronics. Nuclear engineering: Materials of engineering and construction. Mechanics of materials
Website: https://www.sciencedirect.com/journal/journal-of-materiomics

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